Make Pipeline macroable (#56567)

Author: ryangjchandler

src/Illuminate/Pipeline/Pipeline.php

@@ -6,12 +6,14 @@
 use Illuminate\Contracts\Container\Container;
 use Illuminate\Contracts\Pipeline\Pipeline as PipelineContract;
 use Illuminate\Support\Traits\Conditionable;
+use Illuminate\Support\Traits\Macroable;
 use RuntimeException;
 use Throwable;
 
 class Pipeline implements PipelineContract
 {
     use Conditionable;
+    use Macroable;
 
     /**
      * The container implementation.

src/Illuminate/Pipeline/composer.json

@@ -16,6 +16,7 @@
     "require": {
         "php": "^8.2",
         "illuminate/contracts": "^12.0",
+        "illuminate/macroable": "^12.0",
         "illuminate/support": "^12.0"
     },
     "autoload": {